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48 MAINTENANCE 7. Test the throttle control lever by compressing and releasing it several times. The lever must return to the idle position quickly and completely. ADJUSTING CARBURETORS — The carburetors have been cali- brated at the factory for average riding conditions; however, alti- tude, temperature, and general wear may necessitate certain carburetor adjustments. Be sure the correct carburetor main jets for the oper- ating temperature, altitude, and type of gasoline are being used (see Selecting Carburetor Main Jet(s) section). Since carburetor adjustments critically affect engine performance, Arctic Cat recom- mends that all changes in internal carburetor calibration be made by an authorized Arctic Cat Snowmobile dealer; however, four external adjustments can be made on each carburetor. These are the choke cable travel, fuel mixture screws, air screws, and idle speed screw. NOTE: Carburetor adjustments and changing main jets may be Adjusting Choke Cable 1. Be sure the ignition switch key is in the OFF position and the brake lever lock is set. 2. Loosen the jam nut securing each choke cable adjuster on the side of the carburetor. 0735-774 3. Slowly rotate one choke cable adjuster while checking the choke lever for free-play. As soon as all free-play has been removed from the end of the lever, stop rotating the adjuster. 4. With free-play removed from the lever, slowly rotate the adjuster once ag ain while checking the choke lever for free-play. Adjust until 3 mm (1/ 8 in.) free-play between front bottom edge of lever and hous- ing is attained. Securely tighten the jam nut. 732-848B 5. Repeat steps 3 and 4 on the other carburetor. ! WARNING DO NOT operate the snowmo- |